• ### [pix_coloralpha]

I really like the [pix_coloralpha] object......the problem for is that it seems to be just a toggle on/off affair...

I tried substituting the number box for the toggle with the same result...0-1/-1 results in merely switching the effect on or off...

Any thoughts?

• Posts 6 | Views 937
• @lovelovevideo [pix_coloralpha sets the alpha channel to the mean rgb for every pixel.....
Maybe [pix_alpha] will be more useful as threshold can be set for color levels.......
David.

• @whale-av thxx, what I wanted was to adjust the intensity of the effect in real time...

However, [pix_alpha] has proven very useful as I was also looking for a transparency effect........I am thinking a combination of [metro] and different messages may get me closer?

• @lovelovevideo Essentially you want to use your alpha channel to control opacity to create a sort of fading effect? And you're trying to convert whatever value is feeding into the alpha channel from an integer into a float--a decimal value between 0 and 1?

• @lovelovevideo ok, so maybe this is way basic and obvious, but... i've had a similar problem and decided to use [colorRGB] to manipulate "opacity":

Below is just an example. Essentially you want to choose an integer range between 0 and whatever positive integer (the alpha inlet of [colorRGB] uses values between 0 and positive 1). Your input has to be within this range (e.g. 25, 10, 5, etc.). Then divide the input by the range (50) and thus you will yield a float (decimal value) between 0 and 1. The resultant float (decimal) values will be "spaced" out in the same increments as your integer range (i.e. input 5/50 = .1, 10/50 = .2, 15/50 = .3, etc).

I hope this helps and isn't more confusing or besides the point!

• @cwp thanks so much for your response! ok...i'll try it out!

I have been looking for different ways too adjust the intensity of colors(in images) in real time....[contrast] also works, however, it seems to be a bit slow when combined with lots of other objects/effects etc...

EDIT: I think a lot of the magic in this area is going to be with GLSL shaders etc.....an underexposed topic around here, however, some diligent searching can yield some fruit:P

Posts 6 | Views 937
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